<!DOCTYPE html>
<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>Document</title>
  <script src="https://cdn.bootcdn.net/ajax/libs/lodash.js/4.17.21/lodash.min.js"></script>
  <style>
    ul {
      width: 300px;
    }

    ul li {
      height: 50px;
      border-bottom: 1px solid black;
    }
  </style>
</head>

<body>
  <ul>
    <li>1</li>
    <li>2</li>
    <li>3</li>
    <li>4</li>
    <li>5</li>
    <li>6</li>
    <li>7</li>
    <li>8</li>
    <li>9</li>
    <li>10</li>
  </ul>
  <script>
    const list = document.querySelectorAll('ul li')
    function enter() {
      this.style.background = 'red'
    }
    function leave() {
      this.style.background = ''
    }
    const lodashEnter = _.throttle(enter, 30, [trailing = false])
    // const lodashLeave = _.throttle(leave, 8, [leading = true, trailing = true])
    list.forEach(item => {
      item.onmouseenter = lodashEnter
      item.onmouseleave = leave
    })

  </script>
</body>

</html>